#243F9A#243F9A

#243F9A is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.6% C 0.152 H 266.8°. Best body text is #FFFFFF at 9.32:1 contrast (WCAG AA passes).

Color values

HEX	#243F9A
RGB	rgb(36, 63, 154)
HSL	hsl(226, 62%, 37%)
HSV	hsv(226, 77%, 60%)
CMYK	cmyk(76.6%, 59.1%, 0%, 39.6%)
CIE-LAB	lab(30.06, 23.59, -52.62)
CIE-LCH	lch(30.06, 57.67, 294.15°)
OKLab	oklab(40.6% -0.0086 -0.1519)
OKLCH	oklch(40.6% 0.152 266.8)
XYZ	xyz(8.3358, 6.2623, 31.3350)
Luminance	0.0626 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F9A #9A7F24

analogous

#247A9A #243F9A #44249A

triadic

#243F9A #9A243F #3F9A24

tetradic

#243F9A #9A247A #9A7F24 #249A44

square

#243F9A #9A247A #9A7F24 #249A44

split-complementary

#243F9A #9A4424 #7A9A24

monochromatic

#0D1637 #182B68 #243F9A #3053CC #5F7BDA

Accessibility & contrast

On white

9.32

#243F9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#243F9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F9A

9.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F9A	#FFFFFF	#000000	##FFFFFF
##243F9A	1.00	9.32	2.25	9.32
#FFFFFF	9.32	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9D

Deuteranopia (green-blind)

#004298

Tritanopia (blue-blind)

#005666

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #243f9a;
/* rgb */ color: rgb(36, 63, 154);
/* oklch */ color: oklch(40.6% 0.152 266.8);

Tailwind

colors: {
  custom: {
    50: '#7173b9',
    500: '#243f9a',
    950: '#000000',
  },
}

SCSS

$custom: #243f9a;
$custom-light: #7173b9;
$custom-dark: #000000;

JSON

{
  "hex": "#243f9a",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 154
  },
  "hsl": {
    "h": 226.271,
    "s": 62.105,
    "l": 37.255
  },
  "oklch": {
    "l": 0.40595,
    "c": 0.15214,
    "h": 266.8
  },
  "luminance": 0.06263
}

Semantic roles & 50–950 ramp

primary

#243F9A

secondary

#BFA85B

accent

#C043E5

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #243F9A

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →